The Major Leagues within these sports are some of the most powerful and richest in the world which helps raise the popularity of the sport and in turn the memorabilia.

Whilst Soccer is the most popular sport in the world, (referred to by the rest of the world as Football), it is considered a minority sport despite the advent of the Major Soccer League and the introduction of players such as David Beckham. Therefore there is not such a high demand for Soccer Memorabilia.